Custom Quartz Crucibles | 200+ Configurations

✔ Precision engineering: ±0.1mm tolerance with SiC/Al₂O₃ coating options

✔ Quality assured: 100% GD-MS tested for <0.1ppm impurities

Industry-Tailored Features

High-purity fused silica crucibles enable 1680°C polysilicon melting for monocrystalline growth, achieving <12ppm oxygen content in solar-grade silicon ingots.

HF-resistant quartz boats withstand 40% hydrofluoric acid exposure at 200°C for 500+ operational hours, essential for fluorination reactions and acid digestion.

Gas-tight laboratory crucibles with lids facilitate rare-earth alloy synthesis under 10⁻⁶ mbar vacuum, maintaining <0.1% impurity levels in laboratory grade composites.

Mirror-polished crucibles (Ra ≤0.2μm) process platinum group metals at 1750°C with <0.03g material loss, critical for jewelry and catalytic converter production.

Vacuum-rated crucible plates anneal Inconel 718 superalloys at 1300°C with ±3°C uniformity, achieving HRC 45 hardness in turbine components.

Quartz glass fused silica in different shapes and sizes

Fabrication

Fused quartz crucibles remain indispensable for extreme-temperature ashing, reactive chemical tests, and precision metal processing across critical industries.

Optimized for ashing processes, reactive chemical tests, and precision handling of precious or non-precious metals in fused silica containers.

Custom Solution Services

All processes optimized for fused quartz crucibles used in semiconductor manufacturing, high-purity chemical reactions, and extreme temperature applications.

▊Rapid thermal cycling: Withstands 1000°C/min heating rates

▊Chemical inertness: Compatible with 98% H₂SO₄ @500°C

▊Batch consistency: <2% variation across 1000+ units

Design Specification

▌Submit CAD/STP files with ±0.5mm tolerance requirements;

▌Standard capacity: 5mL-50L;

▌Thermal shock resistance validation at ΔT 1000°C

Material Selection

▌99.999% fused silica standard
(alternative: 99.99% for non-critical applications)

▌Thickness options: 1.5-12mm

▌OH content control: <8ppm (low hydroxyl grade)

Precision Forming

▌CNC machining: ±0.1mm dimensional accuracy

▌Maximum size: Φ600×800mm

▌Laser alignment for multi-cavity crucible boats

Surface Treatment

▌Standard: Acid polishing (40% HF, 30min cycle)

▌Optional: Fire polishing at 1250°C

▌Particle count: <50 particles/cm² (>0.3μm)

Quality Verification

▌Helium leak test: <1×10⁻⁶ mbar·L/s

▌Thermal cycling: 1700°C ↔ 25°C, 50 cycles

▌Metrology report: 15+ parameters including concentricity <0.2mm

Quartz Glass Crucibles

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Precision Transparent Quartz Rectangular Tubing for Extreme Environments

Industrial-Grade Quartz Spiral Tubes for Chemical Processing & Lab Instrumentation

Precision Quartz Capillary Tubes for High-Temp Laser & Optical Systems

Sealed ground quartz tube

joint pipe quartz

Reaction cracking quartz tube

quartz digestion tube

plug quartz tube

fused quartz spiral tube

Parameter	Our Product	Industry Average
Max Working Temperature	1750°C	1650-1700°C
Thermal Shock Resistance	ΔT 1100°C (Water quench)	ΔT 800-900°C
Purity Level	99.999% SiO₂	99.95-99.99% SiO₂
Metal Impurities	<5ppm (ICP-MS tested)	15-30ppm
Dimensional Tolerance	±0.1mm (Laser scanned)	±0.3mm
Surface Roughness	Ra 0.4μm(3-stage polished)	Ra 1.2-1.8μm
Acid Resistance	48hrs (40% HF, 25°C)	24-36hrs
OH Content	<8ppm	15-25ppm
Cycle Life	300+ heats (1700°C)	150-200 heats
Vacuum Performance	5×10⁻⁷ mbar (Helium leak test)	1×10⁻⁵ mbar

Universal Maintenance & Handling for Quartz Crucibles

Fused silica containers for extreme industrial applications

1. Cleaning Protocols

Post-use acid wash: 5% HF + 15% HNO₃ at 60°C for 30min

Rinse water purity: 18.2 MΩ·cm deionized water

Drying: 120°C oven with <10% RH for 2h

Industry-Specific Focus:

Photovoltaic: Bake-out at 800°C to remove silicon residues (<0.01mg/cm²)

Chemical Processing: 40% HF-resistant gloves mandatory for handling

Metal Refining: Ultrasonic cleaning in acetone (40kHz, 30min)

2. Thermal Cycling Management

Max heating/cooling rate: 10°C/min below 600°C, 5°C/min above

ΔT shock limit: 1200°C (e.g., 1700°C → 500°C in <30s)

Annealing frequency: Every 50 thermal cycles at 1150°C/4h

Industry-Specific Focus:

Glass Manufacturing: Controlled devitrification monitoring (<1% crystal growth)

Energy: Infrared thermography for ±5°C gradient control

Jewelry: Pre-heat to 300°C before gold alloy loading

3. Storage Conditions

Humidity control: <30% RH with desiccant packs

Temperature stability: 15-25°C avoidance of thermal gradients

Stacking: Non-contact storage with 5mm foam separators

Industry-Specific Focus:

Laboratory: Class 1000 cleanroom storage for micro-crucibles

4. Handling Procedures

Glove material: Nitrile/Viton® (no bare hand contact)

Lifting tools: Quartz-tipped tongs with <5N/cm² pressure limit

ESD control: 1×10⁶-10⁹ Ω anti-static mats

Industry-Specific Focus:

Mining: Shock-absorbing transport frames (15G impact rating)

Optics: UV-blocking storage to prevent solarization

5. Inspection & Reuse Criteria

Wall thickness tolerance: ±0.2mm via ultrasonic testing

Surface defects: Reject if >3 scratches/cm² (≥0.1mm depth)

Maximum cycles: 300 at 1700°C or 500 at 1200°C

Industry-Specific Focus:

Pharmaceutical: TOC analysis (<0.1mg/L extractables)

Research: SEM validation of surface integrity pre-experiment

6. End-of-Life Disposal

Crushing: <5mm fragments for landfill-safe material

Acid recycling: 98% H₂SO₄ digestion for silica recovery

Thermal decomposition: 1000°C/12h for organic contamination removal

Industry-Specific Focus:

Electronics: Ion implantation neutralization for doped crucibles

High-Purity: Triple-rinse with electronic-grade solvents

Composition & Properties of Quartz Crucibles

Material Composition

Purity: 99.99-99.999% fused silica (SiO₂)

<8ppm hydroxyl (OH) content for high-temperature stability

<0.1ppm metallic impurities (Fe, Al, Ca)

Density: 2.2 g/cm³ (low thermal mass)

Thickness options: 1.5-12mm (customizable for ΔT 1200°C thermal shock resistance)

Geometry: Cylindrical/tapered designs (5mL to 50L capacity)

Key Properties

▌Thermal Performance

Max operating temperature: 1700°C (short-term), 1250°C (continuous)

Coefficient of thermal expansion (CTE): 0.55×10⁻⁶/°C

Thermal conductivity: 1.4 W/m·K

▌Chemical Resistance

Withstands 40% HF, 98% H₂SO₄, and aqua regia at 200°C

<0.01% weight loss after 500h acid exposure

▌Mechanical Stability

Compressive strength: 1100 MPa

Surface hardness: Mohs 7

▌Optical Clarity

92% transmittance (190-2500nm wavelength range)

Ra ≤0.2μm polished surfaces for minimal contamination

▌Vacuum Compatibility

Helium leak rate: <1×10⁻⁹ mbar·L/s

Outgassing rate: <5×10⁻⁸ Torr·L/s/cm²

FAQ

Q: How many thermal shock cycles can crucibles withstand in Czochralski processes?

A: Validated for 300+ cycles at ΔT 1200°C (1700°C → 500°C) with zero cracks.

Q: What leak rate ensures vacuum-tight seals for reactive gas reactions?

A: <1×10⁻⁹ mbar·L/s helium leak rate validated via ASTM E499.

Q: What thermal stability is needed for zinc vapor condensation?

A: 0.55×10⁻⁶/°C CTE ensures <0.2mm deformation during 900°C→200°C cycles.

Q: What surface finish prevents sample contamination in trace analysis?

A: Ra ≤0.2μm polished surfaces reduce adhesion to <0.1μg/cm².

Q: How to prevent devitrification during 72h continuous runs?

A: OH-controlled silica (<8ppm) limits crystal growth to <0.5%.

Custom Quartz Crucibles | 200+ Configurations

Industry-Tailored Features

Fabrication